House cleaning isn't just an inside job. Your siding, driveway and garage floor get dirty, too. And just as a freshly cleaned car seems to drive better, a spic-and-span exterior feels great to come home to. Siding: You can clean it the tried-and-true way, rinsing with a hose, using a long-handled brush to scrub with soapy water (laundry detergent works) and then rinsing well. To remove mildew or algae, consider a hand-pump ...